2547

2547 ALLEGRO

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Technical content

Providing interface between low-level logic and power loads, the UDK/UDN/UDQ2547B and UDK/UDN/UDQ2547EB quad power drivers combine logic gates and high-current bipolar outputs with complete output protection. Each of the four outputs will sink 600 mA in the ON state. The outputs have a minimum breakdown voltage (load dump) of 60 V and a sustaining voltage of 40 V. The inputs are compatible with TTL and 5 V CMOS logic systems and include internal pull-down resistors to ensure that the outputs remain OFF if the inputs are open-circuited. Over-current protection for each channel has been designed into these devices and is activated at approximately 1.3 A. It protects each output from short circuits with supply voltages up to 25 V. When a maximum driver output current is reached, that output drive is reduced linearly, maintaining a constant load current. If the over-current or short circuit condition continues, each channel has an independent thermal limit circuit which will sense the rise in junction temperature and turn OFF the individual channel that is at fault. Foldback circuitry decreases the output current if excessive voltage is present across the output and assists in keeping the device within its SOA (safe operating area). Each output also includes diagnostics for increased device protec- tion. If any output is shorted or opened, the diagnostics can signal the controlling circuitry through a common FAULT pin. These devices can be used to drive various resistive loads includ- ing incandescent lamps (without warming or limiting resistors). With the addition of external output clamp diodes, they can be used to drive inductive loads such as relays, solenoids, or dc stepping motors. The suffix ‘B’ devices are 16-pin power DIPs while the suffix ‘EB’ devices are 28-lead power PLCCs for surface-mount applications. Both packages are of batwing construction to provide for maximum package power dissipation. UDx2547B 2547 PROTECTED QUAD POWER DRIVERS ABSOLUTE MAXIMUM RATINGS at TA = 25°C Over-Current Protected Output Voltage, Package Power Dissipation, Operating Temperature Range, TA Storage Temperature Range, *Outputs are current limited at approximately

1.3 A per driver and junction temperature limited

if current in excess of 1.3 A is attempted. See Circuit Description and Application for further information. Always order by complete part number: a prefix to indicate operat- ing temperature range + the basic four-digit part number + a suffix to indicate package style, e.g., UDK2547EB .

FEATURES

n Output SOA Protection n Low Output-Saturation Voltage n Diagnostic FAULT Outputn TTL and 5 V CMOS Compatible Inputs n Independent Over-Current Protection for Each Driver n Independent Thermal Protection for Each Driver n 600 mA Output Current per Channel Data Sheet 29317.4C 3 14 ENABLE GROUND GROUND OUT NO CONNECT. GROUND GROUND OUT 2 OUT 1 FAULT OUT 4 V CC IN4 Dwg. PP-018A IN1 IN2 IN3 SUPPLY

115 Northeast Cutoff, Box 15036

Worcester, Massachusetts 01615-0036 (508) 853-5000 UDx2547EB FUNCTIONAL BLOCK DIAGRAM <<1 W OUT Dwg. FP-007 N FAULT COMMON CONTROL ONE OF FOUR DRIVERS ABLE INN CURRENT LIMIT THERMAL SHUTDOWN GROUND GROUND GROUND GROUND Dwg. PP-019 NO CONNECTION NC ENABLESUPPLY NC CCV OUT 1 OUT 2OUT 3 OUT 4 IN4 IN3 IN2 IN1 NO CONNECTION NO CONNECTION FAULT NC FAULT W Copyright © 1989, 1993, Allegro MicroSystems, Inc. 50 75 100 125 150 ALLOWABLE PACKAGE POWER DISSIPATION IN WATTSTEMPERATURE IN °C R = 6°C/WqJT Dwg. GP-004-1A SUFFIX 'EB', R = 36°C/WqJA SUFFIX 'B', R = 43°C/WqJA

STATUS IN N ENABLE OUT N FAULT Normal Load H H L H LH HH XL HH Over-Current or Short to Supply H H R L Thermal Fault H H H L Open Load or Short to Ground L H L L ELECTRICAL CHARACTERISTICS at TA = +25°C (prefix ÔUDNÕ) or over operating temperature range (prefix ÔUDKÕ or ÔUDQÕ), VCC = 4.75 V to 5.5 V Limits Characteristic Symbol Test Conditions Min. Typ. Max. Units Output Leakage Current* I OUT VOUT = 60 V, VIN = 0.8 V, VEN = 2.0 V — 30 150 µA VOUT = 60 V, VIN = 2.0 V, VEN = 0.8 V — 30 150 µA Output Sustaining Voltage V OUT(SUS) IOUT = 100 mA, VIN = 0.8 V, VCC = Open 40 — — V Output Saturation Voltage V OUT(SAT) IOUT = 400 mA — — 300 mV IOUT = 500 mA — — 400 mV IOUT = 600 mA — — 550 mV Over-Current Limit I OUT 5 ms PulseTest, VOUT = 5.0 V — 1. 3 1.7 A Input Voltage Logic 1 V IN(1) or VEN(1) 2.0 — — V Logic 0 V lN(0) or VEN(0) — — 0.8 V Input Current Logic 1 V IN(1) or VEN(1) = 2.0 V — — 60 µA Logic 0 V IN(0) or VEN(0) = 0.8 V 10 — — µA Fault Output Leakage Current IF VF = 40 V — <1.0 2.0 µA Fault Output Current I F VF = 40 V, Driver Outputs Open, VIN = 0.8 V, VEN = 2.0 V 40 60 80 µA Fault Output Saturation Voltage VF(SAT) IF = 30 µA — 0.1 0.4 V Total Supply Current I CC All Outputs ON — 45 50 mA All Outputs OFF — 6.0 10 mA Thermal Shutdown T J — 165 — °C Thermal Hysteresis ΔTJ —1 5 — °C Typical Data is for design information only. *Measurement includes XOR input current and other elements. X = Don’t care. R = Linear drive, current limited. TRUTH TABLE

Worcester, Massachusetts 01615-0036 (508) 853-5000 CIRCUIT DESCRIPTION AND APPLICATION These devices monitor their outputs for open or shorted conditions. Both conditions are sensed by comparing the input and output states. Note that the FAULT output is operational only if the ENABLE input is high. When a fault condition is sensed, the FAULT output will go to a low state. An external FAULT output filter capacitor (0.1µF) is recom- mended to eliminate erroneous switching. INCANDESCENT LAMP DRIVER High incandescent lamp turn-ON/in-rush currents can contribute to poor lamp reliability and destroy semiconductor lamp drivers. Warming (parallel) or current-limiting (series) resistors protect both driver and lamp but use significant power either when the lamp is OFF or when the lamp is ON, respectively. Lamps with steady-state current ratings up to 600 mA can be driven without the need for warming or current-limiting resistors, if lamp turn-ON time is not a concern. When an incandescent lamp is initially turned ON, the cold filament is at minimum resistance and would normally allow a 10x to 12x in-rush current. With these drivers, during turn-ON, the high in-rush current is sensed by the internal low-value sense resistor, drive current to the output stage is diverted by the shunting transistor, the output stage operates in a linear mode, and the load current is limited to approxi- mately 1.3 A. During lamp warmup, the filament resistance increases to its maximum value, the output driver goes into saturation and applies maximum rated voltage to the lamp. INDUCTIVE LOAD DRIVER With the addition of external clamp diodes, bifilar (unipolar) stepper motors and other inductive loads can be driven directly. The external diodes prevent damage to the output transistors by suppressing the high-voltage spikes that occur when turning OFF an inductive load. For rapid current decay (fast turn-OFF speeds), the use of Zener diodes will raise the flyback voltage and improve performance. However, the peak voltage must not exceed the speci- fied minimum sustaining voltage (V SUPPLY + VZ + VF ≤ VOUT(SUS) ). OVER-CURRENT CONDITIONS In the event of a shorted load, or stalled motor, the load current will attempt to increase. As described above, the drive current to the affected output stage is linearly reduced (limiting the load current to about 1.3 A), causing the output stage to go linear. As the junction temperature of the output stage increases, the thermal shutdown circuit will shut OFF the affected output. If the fault condition is corrected, the output driver will return to its normal saturated condition. NORMAL LAMP IN-RUSH CURRENT TIME Dwg. WP-005A NOT TO SCALE LAMP CURRENT CURRENT LIMIT THERMAL SHUTDOWN THERMAL HYSTERESIS SHORT CIRCUIT

0.508 0.204 7.62 BSC Dwg. MA-001-17A mm 10.92 MAX 1 8 7.11 6.10 5.33 MAX 1.77 1.15 0.39 MIN 0.558 0.356 2.54 BSC 0.13 MIN 3.81 2.93 19.68 18.67 NOTE 4 NOTES: 1. Exact body and lead configuration at vendor’s option within limits shown. 2. Lead spacing tolerance is non-cumulative 3. Lead thickness is measured at seating plane or below. 4. Webbed lead frame. Leads 4, 5, 12, and 13 are internally one piece. UDN2547B and UDQ2547B Dimensions in Inches (controlling dimensions) Dimensions in Millimeters (for reference only) 0.020 0.008 0.300 BSC Dwg. MA-001-17A in 0.430 MAX 1 8 0.280 0.240 0.210 MAX 0.070 0.045 0.015 MIN 0.022 0.014 0.100 BSC 0.005 MIN 0.150 0.115 0.775 0.735 NOTE 4

Worcester, Massachusetts 01615-0036 (508) 853-5000 0.51 MIN 4.57 4.20 1.27 BSC 12.57 12.32 11.582 11.430 128 INDEX AREA Dwg. MA-005-28A mm 0.812 0.661 0.331 0.533 12.57 12.32 18 12 11.58 11.43 5.56 4.85 5.56 4.85 UDN2547EB and UDQ2547EB Dimensions in Inches (controlling dimensions) Dimensions in Millimeters (for reference only) NOTES: 1. Exact body and lead configuration at vendor’s option within limits shown. 2. Lead spacing tolerance is non-cumulative 3. Webbed lead frame. Leads 5 through 11 and 19 through 25 are internally one piece. 18 12 0.020 MIN 0.050 BSC 128 INDEX AREA Dwg. MA-005-28A in 0.026 0.032 0.013 0.021 19 11 0.165 0.180 0.495 0.485 0.456 0.450 0.495 0.485 0.456 0.450 0.219 0.191 0.219 0.191

Allegro MicroSystems, Inc. reserves the right to make, from time to time, such departures from the detail specifications as may be required to permit improvements in the design of its products. The information included herein is believed to be accurate and reliable. However, Allegro MicroSystems, Inc. assumes no responsibility for its use; nor for any infringements of patents or other rights of third parties which may result from its use.

Worcester, Massachusetts 01615-0036 (508) 853-5000 POWER SINK DRIVERS SELECTION GUIDE IN ORDER OF 1) OUTPUT CURRENT, 2) OUTPUT VOLTAGE, 3) NUMBER OF DRIVERS Output Ratings * Features Serial Latched Diode Saturated Internal mA V # Input Drivers Clamp Outputs Protection Part Number 100 20 8 — — — X — 2595 30 32 X X — — — 5833 40 32 X X — X — 5832 250 135 7 — — X — — 7003 300 45 1 Hall Sensor/Driver X — X 5140 50 7 — — X — — 2003 50 8 — — X — — 2803 50 8 — — X X — 2596 60 2 Hall Sensor/Driver — X — 5275 60 4 — — X X X 2557 95 7 — — X — — 2023 95 8 — — X — — 2823 350 50 4 — X X — — 5800 50 7 — — X — — 2004 50 8 — — X — — 2804 50 8 — X X — — 5801 50 8 X X — — — 5821 80 8 X X — — — 5822 50 8 X X X — — 5841 80 8 X X X — — 5842 95 7 — — X — — 2024 95 8 — — X — — 2824 450 30 28 Dual 4 to 14-Line Decoder/Driver — — 6817 600 60 4 — — — X X 2547 60 4 — — X X X 2549 700 60 4 — — X X X 2543 and 2559 750 50 8 — — X X — 2597 900 14 2 Hall Sensor/Driver X X X 3625 26 2 Hall Sensor/Driver X X X 3626 1000 46 4 Stepper Motor Controller/Driver MOS — 7024 and 7029 1200 46 4 Microstepping Controller/Driver MOS — 7042 1250 50 4 Stepper Motor Translator/Driver — X 5804 50 4 — — X — — 2064 and 2068 1500 80 4 — — X — — 2065 and 2069 1600 50 9 X X — — X 5829 1800 50 4 — — X — — 2544 50 4 — — X — — 2540 3000 46 4 Stepper Motor Controller/Driver MOS — 7026 4000 50 4 — — X — — 2878 80 4 — — X — — 2879 * Current is maximum specified test condition, voltage is maximum rating. See specification for sustaining voltage limits or over-current protection voltage limits. † Complete part number includes additional characters to indicate operating temperature range and package style.